Study on Electromagnetic Scattering Characteristic of Hypervelocity Model with SBR Method

Yu, Qidi; Zhang, Cong; He, Zi; Ding, Dazhi; Chen, Rushan

doi:10.1109/compem.2018.8496673

Cited by 1 publication

(2 citation statements)

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“…However, as the frequency of EM waves increases and the complexity of plasma material parameters increases, numerical calculation methods are facing a sharp increase in calculation time and memory requirements. The third category is the study of high-frequency calculation methods represented by the physical optics (PO) method [22][23][24][25][26][27]. Reference [22] calculated the monostatic RCS of the electrically large target simulated by the non-uniform rational B-spline (NURBS) surface covered by non-uniform and non-magnetized plasma.…”

Section: Introductionmentioning

confidence: 99%

“…Yu [23] analyzed the scattering characteristics of hypervelocity models with shooting and bouncing rays (SBR). Liu [24] investigated the multi-band scattering characteristics of a blunt cone with a nonuniform plasma shroud by using the physical optics (PO) method. It should also be pointed out that the plasma model used in the above-mentioned high-frequency calculation method is not magnetized, and most models only use scalar media parameters to characterize plasma, instead of using an asymmetric tensor to characterize the plasma medium attributes.…”

Section: Introductionmentioning

confidence: 99%

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Simulation and Analysis of Electromagnetic Scattering from Anisotropic Plasma-Coated Electrically Large and Complex Targets

Rao

Zhu

et al. 2022

Remote Sensing

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An efficient physical optics (PO) calculation method is proposed for the electromagnetic (EM) scattering of electrically large targets coated with magnetized plasma characterized by asymmetric tensor dielectric parameters. The outer surface of the arbitrarily shaped target is discretized into triangular elements. According to the principle of tangent plane approximation and by using the plane wave spectrum expansion method, the scattered field from one triangular element is derived as a double integral in the spectral domain. To obtain the solution in the spatial domain, the saddle point method is used to asymptotically calculate the integral. Then, the equivalent surface currents (ESCs) are constructed by calculating the surface field at the outer surface of the planar model, from which the PO solution is derived by using the Stratton–Chu integral. Moreover, to interpret the field propagation process in the plasma layer quantitatively, the total scattered field of the coated planar model is decomposed into the superposition of different mode field components. It is observed that the scattered fields demonstrate an inherent cross-polarization phenomenon due to the nonreciprocal constitutive relation of the plasma, which is a distinct feature and is different from the general anisotropic medium whose dielectric parameters can be diagonalized. The effectiveness of the proposed method is verified by numerical results. Furthermore, the proposed algorithm consumes less calculation time and memory as compared to commercial full solvers.

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